A Wankel engine is an internal combustion engine. It uses an eccentric rotary design, which converts the pressure into a rotating motion. Among all the designs of reciprocating piston, the design of the Wankel engine delivers maximum advantages. It has beneficial of compactness, smoothness, and simplicity. This type of engine has high revolutions per minute, which give more performance. Wankel engine has a ratio of high power-to-weight. Wankel engine is also known as a rotary engine. All the components rotate in a single direction in opposition to the common piston engine. The advantage of the engine is that it has a compact design. The weight of the engine manufactured based on this design is low. Theses engine has multiple application. Its rotary engine is fixed in a variety of devices and vehicle, which includes racing car, automobile, aircraft, motorcycle, go karts, snowmobiles, jet skis and auxiliary power units. It does not suffer from scale effects, which engines suffer to limit their size. Wankel engine has the capability to use wider octane rating fuels. It is more efficient compared to a piston engine as it reaches higher revolution per minute. The engine contains fewer parts, which reduces mass-production. It can also be used in personal watercraft for aircraft. It does not have any reciprocating part in it.